You should also have a look at Minous trachycephalus. Reef fishes of the East Indies and Reef fish identification Tropical Pacific don't agree on this one. They both contain the exact same image, but RFTP calls it M. pictus whereas RFEI calls it M. trachycephalus. Fishbash is also ambiguous but the top panel figures, which I believe to be considered more authorative, give the nod to RFEI. The bottom images uploaded by the general public support the M. pictus ID but that may be because those people where using the RFTP book. FREI is more recent and if Gerald Allan, the lead author of both books, actively decided to change the ID for this image I trust he knew what he was doing (though it is odd that M. pictus is not included in the book at all?)